My wife and I just bought a house a few weeks ago with a pool and overall everything looks to be in very good shape. A possible exception is one section of seat in the spa that looks to have plaster circles/chunks missing. I don't see this anywhere else in the pool or spa and was hopeful that this community could point me in the right direction for repairing this before it gets worse. Also in case it matters the previous owner use the term gunite so that may affect the repair procedure.
Thankfully, since this is in the spa I could easily drain water to below the seat if needed for repair. Any help is much appreciated. Thank you!!